/usr/lib/python3/dist-packages/rasterio/rio/rasterize.py is in python3-rasterio 0.36.0-2build5.
This file is owned by root:root, with mode 0o644.
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import logging
from math import ceil
import os
import click
import cligj
from .helpers import resolve_inout
from . import options
import rasterio
from rasterio.errors import CRSError
from rasterio.transform import Affine
from rasterio.coords import disjoint_bounds
logger = logging.getLogger('rio')
# Common options used below
# Unlike the version in cligj, this one doesn't require values.
files_inout_arg = click.argument(
'files',
nargs=-1,
type=click.Path(resolve_path=True),
metavar="INPUTS... OUTPUT")
@click.command(short_help='Rasterize features.')
@files_inout_arg
@options.output_opt
@cligj.format_opt
@options.like_file_opt
@options.bounds_opt
@options.dimensions_opt
@options.resolution_opt
@click.option('--src-crs', '--src_crs', 'src_crs', default=None,
help='Source coordinate reference system. Limited to EPSG '
'codes for now. Used as output coordinate system if output '
'does not exist or --like option is not used. '
'Default: EPSG:4326')
@options.all_touched_opt
@click.option('--default-value', '--default_value', 'default_value',
type=float, default=1, help='Default value for rasterized pixels')
@click.option('--fill', type=float, default=0,
help='Fill value for all pixels not overlapping features. Will '
'be evaluated as NoData pixels for output. Default: 0')
@click.option('--property', 'prop', type=str, default=None, help='Property in '
'GeoJSON features to use for rasterized values. Any features '
'that lack this property will be given --default_value instead.')
@options.force_overwrite_opt
@options.creation_options
@click.pass_context
def rasterize(
ctx,
files,
output,
driver,
like,
bounds,
dimensions,
res,
src_crs,
all_touched,
default_value,
fill,
prop,
force_overwrite,
creation_options):
"""Rasterize GeoJSON into a new or existing raster.
If the output raster exists, rio-rasterize will rasterize feature values
into all bands of that raster. The GeoJSON is assumed to be in the same
coordinate reference system as the output unless --src-crs is provided.
--default_value or property values when using --property must be using a
data type valid for the data type of that raster.
If a template raster is provided using the --like option, the affine
transform and data type from that raster will be used to create the output.
Only a single band will be output.
The GeoJSON is assumed to be in the same coordinate reference system unless
--src-crs is provided.
--default_value or property values when using --property must be using a
data type valid for the data type of that raster.
--driver, --bounds, --dimensions, and --res are ignored when output exists
or --like raster is provided
If the output does not exist and --like raster is not provided, the input
GeoJSON will be used to determine the bounds of the output unless
provided using --bounds.
--dimensions or --res are required in this case.
If --res is provided, the bottom and right coordinates of bounds are
ignored.
Note:
The GeoJSON is not projected to match the coordinate reference system
of the output or --like rasters at this time. This functionality may be
added in the future.
"""
from rasterio.crs import CRS
from rasterio.features import rasterize
from rasterio.features import bounds as calculate_bounds
verbosity = (ctx.obj and ctx.obj.get('verbosity')) or 1
output, files = resolve_inout(
files=files, output=output, force_overwrite=force_overwrite)
bad_param = click.BadParameter('invalid CRS. Must be an EPSG code.',
ctx, param=src_crs, param_hint='--src_crs')
has_src_crs = src_crs is not None
try:
src_crs = CRS.from_string(src_crs) if has_src_crs else CRS.from_string('EPSG:4326')
except CRSError:
raise bad_param
# If values are actually meant to be integers, we need to cast them
# as such or rasterize creates floating point outputs
if default_value == int(default_value):
default_value = int(default_value)
if fill == int(fill):
fill = int(fill)
with rasterio.Env(CPL_DEBUG=verbosity > 2):
def feature_value(feature):
if prop and 'properties' in feature:
return feature['properties'].get(prop, default_value)
return default_value
with click.open_file(files.pop(0) if files else '-') as gj_f:
geojson = json.loads(gj_f.read())
if 'features' in geojson:
geometries = []
for f in geojson['features']:
geometries.append((f['geometry'], feature_value(f)))
elif 'geometry' in geojson:
geometries = ((geojson['geometry'], feature_value(geojson)), )
else:
raise click.BadParameter('Invalid GeoJSON', param=input,
param_hint='input')
geojson_bounds = geojson.get('bbox', calculate_bounds(geojson))
if os.path.exists(output):
with rasterio.open(output, 'r+') as out:
if has_src_crs and src_crs != out.crs:
raise click.BadParameter('GeoJSON does not match crs of '
'existing output raster',
param='input', param_hint='input')
if disjoint_bounds(geojson_bounds, out.bounds):
click.echo("GeoJSON outside bounds of existing output "
"raster. Are they in different coordinate "
"reference systems?",
err=True)
meta = out.meta.copy()
result = rasterize(
geometries,
out_shape=(meta['height'], meta['width']),
transform=meta.get('affine', meta['transform']),
all_touched=all_touched,
dtype=meta.get('dtype', None),
default_value=default_value,
fill=fill)
for bidx in range(1, meta['count'] + 1):
data = out.read(bidx, masked=True)
# Burn in any non-fill pixels, and update mask accordingly
ne = result != fill
data[ne] = result[ne]
data.mask[ne] = False
out.write(data, indexes=bidx)
else:
if like is not None:
template_ds = rasterio.open(like)
if has_src_crs and src_crs != template_ds.crs:
raise click.BadParameter('GeoJSON does not match crs of '
'--like raster',
param='input', param_hint='input')
if disjoint_bounds(geojson_bounds, template_ds.bounds):
click.echo("GeoJSON outside bounds of --like raster. "
"Are they in different coordinate reference "
"systems?",
err=True)
kwargs = template_ds.meta.copy()
kwargs['count'] = 1
# DEPRECATED
# upgrade transform to affine object or we may get an invalid
# transform set on output
kwargs['transform'] = template_ds.affine
template_ds.close()
else:
bounds = bounds or geojson_bounds
if src_crs.is_geographic:
if (bounds[0] < -180 or bounds[2] > 180 or
bounds[1] < -80 or bounds[3] > 80):
raise click.BadParameter(
"Bounds are beyond the valid extent for "
"EPSG:4326.",
ctx, param=bounds, param_hint='--bounds')
if dimensions:
width, height = dimensions
res = (
(bounds[2] - bounds[0]) / float(width),
(bounds[3] - bounds[1]) / float(height)
)
else:
if not res:
raise click.BadParameter(
'pixel dimensions are required',
ctx, param=res, param_hint='--res')
elif len(res) == 1:
res = (res[0], res[0])
width = max(int(ceil((bounds[2] - bounds[0]) /
float(res[0]))), 1)
height = max(int(ceil((bounds[3] - bounds[1]) /
float(res[1]))), 1)
kwargs = {
'count': 1,
'crs': src_crs,
'width': width,
'height': height,
'transform': Affine(res[0], 0, bounds[0], 0, -res[1],
bounds[3]),
'driver': driver
}
kwargs.update(**creation_options)
result = rasterize(
geometries,
out_shape=(kwargs['height'], kwargs['width']),
transform=kwargs.get('affine', kwargs['transform']),
all_touched=all_touched,
dtype=kwargs.get('dtype', None),
default_value=default_value,
fill=fill)
if 'dtype' not in kwargs:
kwargs['dtype'] = result.dtype
kwargs['nodata'] = fill
with rasterio.open(output, 'w', **kwargs) as out:
out.write(result, indexes=1)
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